unquietcode.utils

Class CollectionUtils

java.lang.Object

unquietcode.utils.CollectionUtils

public final class CollectionUtils
extends java.lang.Object

Method Summary

Modifier and Type	Method and Description
static <K,V> void	addToArrayList(java.util.Map<K,java.util.List<V>> map, K key, V value)
static <_Key1,_Key2,_Value> void	addToHashMap(java.util.Map<_Key1,java.util.Map<_Key2,_Value>> map, _Key1 outerKey, _Key2 innerKey, _Value value)
static <K,V> void	addToHashSet(java.util.Map<K,java.util.Set<V>> map, K key, V value)
static <_Key1,_Key2,_Value> void	addToIdentityHashMap(java.util.Map<_Key1,java.util.Map<_Key2,_Value>> map, _Key1 outerKey, _Key2 innerKey, _Value value)
static <K,V> void	addToIdentityHashSet(java.util.Map<K,java.util.Set<V>> map, K key, V value)
static <K,V,T extends java.util.Collection<V>> void	addToMap(java.util.Map<K,T> map, K key, V value, Factory<T> factory)
static <_Key1,_Key2,_Value> void	addToNestedMap(java.util.Map<_Key1,java.util.Map<_Key2,_Value>> map, _Key1 outerKey, _Key2 innerKey, _Value value, Factory<java.util.Map<_Key2,_Value>> factory)
static <T> T[]	append(T[] array, T... newValues)
static <T> T[]	array(T... values)
static <T> java.util.List<T>	deduplicate(T[] array, Factory<java.util.Set<T>> setFactory)
static <T> T	first(java.util.List<T> list)
static <T> java.util.List<T>	flatten(java.util.Collection<? extends java.util.Collection<T>> items)
static <T> java.util.Set<T>	hashSet(T... values)
static <T> boolean	isEmpty(java.util.Collection<T> collection)
static <T> boolean	isEmpty(T[] array)
static <T> boolean	isNotEmpty(java.util.Collection<T> collection)
static <T> boolean	isNotEmpty(T[] array)
static <T> T	last(java.util.List<T> list)
static <T> java.util.List<T>	list(T... values)
static <T> java.util.Set<T>	newIdentityHashSet()
static <T> T[]	prepend(T[] array, T... newValues)
static java.lang.String	print(java.util.Collection<?> values)
static java.lang.String	print(java.util.Map<?,?> values)
static java.lang.String	print(java.lang.Object... values)
static java.lang.String	print(java.lang.String delimiter, java.util.Collection<?> values)
static java.lang.String	print(java.lang.String delimiter, java.lang.Object... values)
static java.lang.String	print(java.lang.String prefix, java.lang.String suffix, java.lang.String delimiter, java.util.Collection<?> values)
static java.lang.String	print(java.lang.String prefix, java.lang.String suffix, java.lang.String delimiter, java.lang.Object... values)
static <T> java.util.Set<T>	randomSubset(java.util.Set<T> set, int count, java.util.Set<T> target)
static <T> java.util.Collection<T>	safe(java.util.Collection<T> collection) null-safe collection reference
static <T> java.util.List<T>	safe(java.util.List<T> list)
static <T> java.util.List<T>	safe(T[] list)
static <K,V> V	synchronized_get_or_set(java.util.Map<K,V> map, K key, java.util.function.Supplier<V> valueProvider)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

array

@SafeVarargs
public static <T> T[] array(T... values)

prepend

@SafeVarargs
public static <T> T[] prepend(T[] array,
                                           T... newValues)

append

@SafeVarargs
public static <T> T[] append(T[] array,
                                          T... newValues)

deduplicate

public static <T> java.util.List<T> deduplicate(T[] array,
                                                Factory<java.util.Set<T>> setFactory)

list

@SafeVarargs
public static <T> java.util.List<T> list(T... values)

hashSet

@SafeVarargs
public static <T> java.util.Set<T> hashSet(T... values)

print

public static java.lang.String print(java.util.Collection<?> values)

print

public static java.lang.String print(java.util.Map<?,?> values)

print

public static java.lang.String print(java.lang.Object... values)

print

public static java.lang.String print(java.lang.String delimiter,
                                     java.util.Collection<?> values)

print

public static java.lang.String print(java.lang.String delimiter,
                                     java.lang.Object... values)

print

public static java.lang.String print(java.lang.String prefix,
                                     java.lang.String suffix,
                                     java.lang.String delimiter,
                                     java.lang.Object... values)

print

public static java.lang.String print(java.lang.String prefix,
                                     java.lang.String suffix,
                                     java.lang.String delimiter,
                                     java.util.Collection<?> values)

randomSubset

public static <T> java.util.Set<T> randomSubset(java.util.Set<T> set,
                                                int count,
                                                java.util.Set<T> target)

synchronized_get_or_set

public static <K,V> V synchronized_get_or_set(java.util.Map<K,V> map,
                                              K key,
                                              java.util.function.Supplier<V> valueProvider)

first

public static <T> T first(java.util.List<T> list)

last

public static <T> T last(java.util.List<T> list)

safe

public static <T> java.util.Collection<T> safe(java.util.Collection<T> collection)

null-safe collection reference

safe

public static <T> java.util.List<T> safe(java.util.List<T> list)

safe

public static <T> java.util.List<T> safe(T[] list)

isEmpty

public static <T> boolean isEmpty(java.util.Collection<T> collection)

isNotEmpty

public static <T> boolean isNotEmpty(java.util.Collection<T> collection)

isEmpty

public static <T> boolean isEmpty(T[] array)

isNotEmpty

public static <T> boolean isNotEmpty(T[] array)

addToArrayList

public static <K,V> void addToArrayList(java.util.Map<K,java.util.List<V>> map,
                                        K key,
                                        V value)

addToHashSet

public static <K,V> void addToHashSet(java.util.Map<K,java.util.Set<V>> map,
                                      K key,
                                      V value)

addToIdentityHashSet

public static <K,V> void addToIdentityHashSet(java.util.Map<K,java.util.Set<V>> map,
                                              K key,
                                              V value)

addToMap

public static <K,V,T extends java.util.Collection<V>> void addToMap(java.util.Map<K,T> map,
                                                                    K key,
                                                                    V value,
                                                                    Factory<T> factory)

addToHashMap

public static <_Key1,_Key2,_Value> void addToHashMap(java.util.Map<_Key1,java.util.Map<_Key2,_Value>> map,
                                                     _Key1 outerKey,
                                                     _Key2 innerKey,
                                                     _Value value)

addToIdentityHashMap

public static <_Key1,_Key2,_Value> void addToIdentityHashMap(java.util.Map<_Key1,java.util.Map<_Key2,_Value>> map,
                                                             _Key1 outerKey,
                                                             _Key2 innerKey,
                                                             _Value value)

addToNestedMap

public static <_Key1,_Key2,_Value> void addToNestedMap(java.util.Map<_Key1,java.util.Map<_Key2,_Value>> map,
                                                       _Key1 outerKey,
                                                       _Key2 innerKey,
                                                       _Value value,
                                                       Factory<java.util.Map<_Key2,_Value>> factory)

newIdentityHashSet

public static <T> java.util.Set<T> newIdentityHashSet()

flatten

public static <T> java.util.List<T> flatten(java.util.Collection<? extends java.util.Collection<T>> items)